CA2505252A1 - Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications - Google Patents
Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications Download PDFInfo
- Publication number
- CA2505252A1 CA2505252A1 CA002505252A CA2505252A CA2505252A1 CA 2505252 A1 CA2505252 A1 CA 2505252A1 CA 002505252 A CA002505252 A CA 002505252A CA 2505252 A CA2505252 A CA 2505252A CA 2505252 A1 CA2505252 A1 CA 2505252A1
- Authority
- CA
- Canada
- Prior art keywords
- fluid
- density
- drilling
- riser
- seabed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012530 fluid Substances 0.000 title claims abstract 81
- 238000005553 drilling Methods 0.000 title claims abstract 46
- 238000000034 method Methods 0.000 title claims abstract 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract 10
- 230000000630 rising effect Effects 0.000 claims abstract 4
- 239000013535 sea water Substances 0.000 claims abstract 4
- 238000005520 cutting process Methods 0.000 claims abstract 3
- 239000007788 liquid Substances 0.000 claims 16
- 239000000203 mixture Substances 0.000 claims 6
- 238000003780 insertion Methods 0.000 claims 3
- 230000037431 insertion Effects 0.000 claims 3
- 238000005086 pumping Methods 0.000 claims 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000004891 communication Methods 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract 3
- 239000007924 injection Substances 0.000 abstract 3
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/001—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor specially adapted for underwater drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
- E21B21/085—Underbalanced techniques, i.e. where borehole fluid pressure is below formation pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/068—Well heads; Setting-up thereof having provision for introducing objects or fluids into, or removing objects from, wells
- E21B33/076—Well heads; Setting-up thereof having provision for introducing objects or fluids into, or removing objects from, wells specially adapted for underwater installations
Abstract
A method and apparatus for controlling drilling mud density at a location either at the seabed (20) (or just above the seabed (20)) or alternatively below the seabed of wells (40) in deep water and ultra deep water applicatio ns are disclosed. The present invention combines abase fluid of lesser density than the mud required at the wellhead (300) to produce a diluted mud in the riser (80). By combining the appropriate quantities of drilling mud with bas e fluid, a riser mud density at or near the density of seawater may be achieve d. The present invention also includes a wellhead injection device (32) for attachment to the wellhead (300) and for injecting the base fluid into the rising drilling mud at a location below the seabed (20). The riser charging lines (100) are used to carry the low density base fluid to the injection device (32) for injection into the drilling mud below the seabed (20). The cuttings are brought to the surface with the diluted mud and separated in th e usual manner. The diluted mud is then passed through a centrifuge system to separate the heavier drilling mud from the lighter base fluid.
Claims (27)
1. A method employed at the surface in a well drilling system for varying the density of fluid in a tubular member located below the seabed, said method comprising the steps of:
(a) introducing at the surface a first fluid having a first predetermined density into a drill tube, said first fluid being released from the drill tube and into the tubular member;
(b) introducing a second fluid having a second predetermined density into the tubular member at a location below the seabed for producing a combination fluid having a predetermined density that is defined by a selected ratio of the first fluid and the second fluid, said combination fluid rising to the surface; and (c) separating the combination fluid after it has risen to the surface into the first fluid and the second fluid and storing the first fluid and second fluid in separate storage units at the surface.
(a) introducing at the surface a first fluid having a first predetermined density into a drill tube, said first fluid being released from the drill tube and into the tubular member;
(b) introducing a second fluid having a second predetermined density into the tubular member at a location below the seabed for producing a combination fluid having a predetermined density that is defined by a selected ratio of the first fluid and the second fluid, said combination fluid rising to the surface; and (c) separating the combination fluid after it has risen to the surface into the first fluid and the second fluid and storing the first fluid and second fluid in separate storage units at the surface.
2. The method of claim 1, wherein the step of introducing a second fluid into the tubular member below the seabed further comprises the steps of:
(a) providing an insertion apparatus attached to the top of the tubular member;
(b) providing a charging line running from the surface to the insertion apparatus;
(c) releasing the second fluid into the charging line; and (d) pumping the second fluid downward through the charging line and into the tubular member via the insertion apparatus.
(a) providing an insertion apparatus attached to the top of the tubular member;
(b) providing a charging line running from the surface to the insertion apparatus;
(c) releasing the second fluid into the charging line; and (d) pumping the second fluid downward through the charging line and into the tubular member via the insertion apparatus.
3. The method of claim 1, wherein there is a blowout preventer system associated with the drilling system through which the drill tube and tubular member pass, the blowout preventer system being positioned at the seabed and wherein the second fluid is introduced into the tubular member below the blowout preventer system.
4. The method of claim 1, wherein the second density is lower than the first density.
5. The method of claim 1, wherein the second density is lower than the density of seawater.
6. The method of claim 1, wherein the second density is lower than 8.6 PPG.
7. The method of claim 6, wherein the second density is 6.5 PPG.
8. The method of claim 4, wherein the second density is lower than the density of seawater and the first density is higher than the density of seawater.
9. The method of claim 4, wherein the second density is less than 8.6 PPG and the first density is greater than 8.6 PPG.
10. The method of claim 4, wherein the second density is 6.5 PPG and the first density is 12.5 PPG.
11. The method of claim 1, wherein the first fluid is introduced into the drill tube at a first flow rate and the second fluid is introduced into the riser at a second flow rate.
12. The method of claim 11, wherein the first flow rate is slower than the second flow rate.
13. The method of claim 12, wherein the density of the combination fluid is determined by the combined densities of the first fluid and the second fluid and the first and second flow rates.
14. The method of claim 13, wherein the density of the combination fluid is defined by the formula:
Mr - [(F Mi × M i) + (F Mb × M b)] / (F Mi + F Mb), where:
F Mi = flow rate F i of the first fluid, F Mb = flow rate F b of the second fluid, Mi = first density, Mb = second density, and Mr = density of combination fluid.
Mr - [(F Mi × M i) + (F Mb × M b)] / (F Mi + F Mb), where:
F Mi = flow rate F i of the first fluid, F Mb = flow rate F b of the second fluid, Mi = first density, Mb = second density, and Mr = density of combination fluid.
15. The method of claim 14, wherein:
Mi = 12.5 PPG, Mb = 6.5 PPG, F Mi = 800 gpm, and F Mb = 1500 gpm.
Mi = 12.5 PPG, Mb = 6.5 PPG, F Mi = 800 gpm, and F Mb = 1500 gpm.
16. The method of claim 15, wherein the flow rate F r of the combination fluid is the combined flow rate F i of the first fluid and F b of the second fluid, specifically F r = F i + F b.
17. An apparatus for varying the density of upwardly rising drilling fluid in a tubular member having an upper end located at the seabed and a lower end extending below the seabed, said apparatus comprising:
(a) a sleeve having a diameter less than the diameter of the tubular member and having a length less than the length of the tubular member, said sleeve residing within the tubular member to form an annular channel between the tubular member and the sleeve;
(b) a connector for attaching the upper end of the sleeve to the upper end of the tubular member, said connector having an inlet port formed therein for establishing communication between the surface and the annular channel;
(c) a charging line running from the surface to the inlet of the connector, said charging line providing a conduit through which a base fluid having a density different than the density of the rising drilling fluid is released into the tubular member.
(a) a sleeve having a diameter less than the diameter of the tubular member and having a length less than the length of the tubular member, said sleeve residing within the tubular member to form an annular channel between the tubular member and the sleeve;
(b) a connector for attaching the upper end of the sleeve to the upper end of the tubular member, said connector having an inlet port formed therein for establishing communication between the surface and the annular channel;
(c) a charging line running from the surface to the inlet of the connector, said charging line providing a conduit through which a base fluid having a density different than the density of the rising drilling fluid is released into the tubular member.
18. An apparatus for generating a riser fluid for use in a subsea well containing drilling fluid, said riser fluid having a density different from the drilling fluid, comprising:
(a) a drilling platform;
(b) a wellhead on the seabed;
(c) a drill string connecting the platform to the well, said drill string comprising a drill stem, drill tube, and casing for defining the riser;
(d) at least one charging line associated with the riser, said charging line running from the drilling platform to the riser at a location below the seabed;
(e) a source of drilling fluid having a first predetermined density on the platform for providing the drilling fluid to be introduced into the drill tube;
(f) a source of additional fluid having a second predetermined density on the platform for providing the additional fluid to be introduced into the charging lines whereby the first fluid and the second fluid are combined in the riser below the seabed for producing a combined fluid having a density different from the density of the drilling fluid; and (g) a separator on the platform for separating the combined fluid into its components as the combined fluid is discharged from the riser.
(a) a drilling platform;
(b) a wellhead on the seabed;
(c) a drill string connecting the platform to the well, said drill string comprising a drill stem, drill tube, and casing for defining the riser;
(d) at least one charging line associated with the riser, said charging line running from the drilling platform to the riser at a location below the seabed;
(e) a source of drilling fluid having a first predetermined density on the platform for providing the drilling fluid to be introduced into the drill tube;
(f) a source of additional fluid having a second predetermined density on the platform for providing the additional fluid to be introduced into the charging lines whereby the first fluid and the second fluid are combined in the riser below the seabed for producing a combined fluid having a density different from the density of the drilling fluid; and (g) a separator on the platform for separating the combined fluid into its components as the combined fluid is discharged from the riser.
19. The apparatus of claim 18, wherein said first density is greater than said second density.
20. The apparatus of claim 18, wherein the separator comprises a centrifuge system.
21. The apparatus of claim 18, further including a first set of pumps for pumping the drilling fluid into the drill tube at a first rate of flow and a second set of pumps for pumping the additional fluid into the charging line at a second rate of flow.
22. The apparatus of claim 21, wherein the first rate of flow is slower than the second rate of flow.
23. An apparatus for generating a riser fluid for use in a subsea well containing drilling fluid, said riser fluid having a density different from the drilling fluid, comprising:
(a) a drilling platform;
(b) a wellhead on the seabed;
(c) a drill string connecting the platform to the well, said drill string comprising a drill stem, drill tube, and casing for defining the riser;
(d) a source of drilling fluid having a first predetermined density on the platform for providing the drilling fluid to be introduced into the drill tube;
(e) a source of additional fluid having a second predetermined density on the platform for providing the additional fluid to be inserted into the riser whereby the first fluid and the second fluid are combined in the riser for producing a combined fluid having a density different from the density of the drilling fluid;
(f) a valve for directing the additional fluid, said valve moveable between:
(i) a first position where the additional fluid is directed into the riser at a first location which is below the seabed, and (ii) a second position where the additional fluid is directed into the riser at a second location which is above the first location;
(g) a set of charging lines comprising: (i) a first charging line running from the drilling platform to the valve, (ii) a second charging line running from the valve to the riser at the first location, and (iii) a third charging line running from the valve to the riser at the second location; and (h) a separator on the platform for separating the combined fluid into its components as the combined fluid is discharged from the riser.
(a) a drilling platform;
(b) a wellhead on the seabed;
(c) a drill string connecting the platform to the well, said drill string comprising a drill stem, drill tube, and casing for defining the riser;
(d) a source of drilling fluid having a first predetermined density on the platform for providing the drilling fluid to be introduced into the drill tube;
(e) a source of additional fluid having a second predetermined density on the platform for providing the additional fluid to be inserted into the riser whereby the first fluid and the second fluid are combined in the riser for producing a combined fluid having a density different from the density of the drilling fluid;
(f) a valve for directing the additional fluid, said valve moveable between:
(i) a first position where the additional fluid is directed into the riser at a first location which is below the seabed, and (ii) a second position where the additional fluid is directed into the riser at a second location which is above the first location;
(g) a set of charging lines comprising: (i) a first charging line running from the drilling platform to the valve, (ii) a second charging line running from the valve to the riser at the first location, and (iii) a third charging line running from the valve to the riser at the second location; and (h) a separator on the platform for separating the combined fluid into its components as the combined fluid is discharged from the riser.
24. The apparatus of claim 23, wherein the second location is at the seabed.
25. The apparatus of claim 23, wherein the second location is above the seabed.
26. A method of drilling a well below a body of water in which a drill bit is rotated at the end of a drill string, comprising:
(a) injecting into the well at a depth below the water surface a liquid having a lower density than a density of a drilling mud producing a mixture of drilling mud and low-density liquid in the well;
(b) withdrawing the mixture of drilling mud and low-density liquid from an upper end of the well;
(c) separating at least a portion of low-density liquid from the mixture of drilling mud and low-density liquid, thereby producing a drilling mud depleted of low-density liquid;
(d) returning at least a portion of the separated low-density liquid to the depth below the water surface; and (e) returning at least a portion of the drilling mud depleted of low-density liquid to an upper end of the drill string.
(a) injecting into the well at a depth below the water surface a liquid having a lower density than a density of a drilling mud producing a mixture of drilling mud and low-density liquid in the well;
(b) withdrawing the mixture of drilling mud and low-density liquid from an upper end of the well;
(c) separating at least a portion of low-density liquid from the mixture of drilling mud and low-density liquid, thereby producing a drilling mud depleted of low-density liquid;
(d) returning at least a portion of the separated low-density liquid to the depth below the water surface; and (e) returning at least a portion of the drilling mud depleted of low-density liquid to an upper end of the drill string.
27. A method of treating a drilling fluid used in drilling a wellbore in a earth formation below a body of water in which a drill string extends from a water-surface drilling facility into the wellbore and the drilling fluid passes through the drill string and flows from the drill string into the wellbore whereby cuttings resulting from the drilling becomes entrained in the drilling fluid and the drilling fluid with the entrained cuttings returns to the surface of the body of water by means of a return flow system, comprising:
(a) injecting into the return flow system at a depth below the surface of the body of water a liquid having a density lower than a density of the drilling fluid, thereby producing in a return flow system a mixture of drilling fluid and a low-density liquid;
(b) withdrawing the mixture of drilling fluid and low-density liquid from an upper end of the return flow system;
(c) separating at least a portion of the low-density liquid from the mixture of drilling fluid and low-density liquid, thereby producing a drilling fluid depleted of low-density liquid;
(d) returning at least a portion of the separated low-density liquid to the return flow system to the depth below the water surface; and (e) returning at least a portion of the drilling fluid depleted of low-density liquid to the drill string.
(a) injecting into the return flow system at a depth below the surface of the body of water a liquid having a density lower than a density of the drilling fluid, thereby producing in a return flow system a mixture of drilling fluid and a low-density liquid;
(b) withdrawing the mixture of drilling fluid and low-density liquid from an upper end of the return flow system;
(c) separating at least a portion of the low-density liquid from the mixture of drilling fluid and low-density liquid, thereby producing a drilling fluid depleted of low-density liquid;
(d) returning at least a portion of the separated low-density liquid to the return flow system to the depth below the water surface; and (e) returning at least a portion of the drilling fluid depleted of low-density liquid to the drill string.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/289,505 | 2002-11-06 | ||
| US10/289,505 US6843331B2 (en) | 2001-02-15 | 2002-11-06 | Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications |
| PCT/US2003/034993 WO2004044366A2 (en) | 2002-11-06 | 2003-11-03 | Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2505252A1 true CA2505252A1 (en) | 2004-05-27 |
| CA2505252C CA2505252C (en) | 2012-07-10 |
Family
ID=32312099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2505252A Expired - Fee Related CA2505252C (en) | 2002-11-06 | 2003-11-03 | Method and apparatus for varying the density of drilling fluids in deep water oil drilling applications |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US6843331B2 (en) |
| EP (1) | EP1558831B1 (en) |
| AT (1) | ATE442512T1 (en) |
| AU (1) | AU2003301917A1 (en) |
| BR (1) | BR0315434A (en) |
| CA (1) | CA2505252C (en) |
| DE (1) | DE60329214D1 (en) |
| DK (1) | DK1558831T3 (en) |
| NO (1) | NO330148B1 (en) |
| WO (1) | WO2004044366A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7992654B2 (en) | 2001-02-15 | 2011-08-09 | Dual Gradient Systems, Llc | Dual gradient drilling method and apparatus with an adjustable centrifuge |
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| US6926101B2 (en) * | 2001-02-15 | 2005-08-09 | Deboer Luc | System and method for treating drilling mud in oil and gas well drilling applications |
| US7093662B2 (en) * | 2001-02-15 | 2006-08-22 | Deboer Luc | System for drilling oil and gas wells using a concentric drill string to deliver a dual density mud |
| CA2803812C (en) | 2001-09-10 | 2015-11-17 | Ocean Riser Systems As | Arrangement and method for regulating bottom hole pressures when drilling deepwater offshore wells |
| US7950463B2 (en) * | 2003-03-13 | 2011-05-31 | Ocean Riser Systems As | Method and arrangement for removing soils, particles or fluids from the seabed or from great sea depths |
| NO318220B1 (en) * | 2003-03-13 | 2005-02-21 | Ocean Riser Systems As | Method and apparatus for performing drilling operations |
| US6953097B2 (en) | 2003-08-01 | 2005-10-11 | Varco I/P, Inc. | Drilling systems |
| US7032691B2 (en) * | 2003-10-30 | 2006-04-25 | Stena Drilling Ltd. | Underbalanced well drilling and production |
| NO319213B1 (en) * | 2003-11-27 | 2005-06-27 | Agr Subsea As | Method and apparatus for controlling drilling fluid pressure |
| WO2007145734A2 (en) * | 2006-06-07 | 2007-12-21 | Exxonmobil Upstream Research Company | Compressible objects having partial foam interiors combined with a drilling fluid to form a variable density drilling mud |
| US8088716B2 (en) * | 2004-06-17 | 2012-01-03 | Exxonmobil Upstream Research Company | Compressible objects having a predetermined internal pressure combined with a drilling fluid to form a variable density drilling mud |
| WO2007145731A2 (en) * | 2006-06-07 | 2007-12-21 | Exxonmobil Upstream Research Company | Compressible objects combined with a drilling fluid to form a variable density drilling mud |
| US7490672B2 (en) * | 2005-09-09 | 2009-02-17 | Baker Hughes Incorporated | System and method for processing drilling cuttings during offshore drilling |
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| NO325931B1 (en) * | 2006-07-14 | 2008-08-18 | Agr Subsea As | Device and method of flow aid in a pipeline |
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| CA2771095C (en) | 2009-08-18 | 2017-11-07 | Pilot Drilling Control Limited | Flow stop valve |
| IN2012DN02965A (en) * | 2009-09-10 | 2015-07-31 | Bp Corp North America Inc | |
| US8403059B2 (en) * | 2010-05-12 | 2013-03-26 | Sunstone Technologies, Llc | External jet pump for dual gradient drilling |
| US8322425B2 (en) * | 2010-05-20 | 2012-12-04 | Chevron U.S.A., Inc. | System and method for controlling one or more fluid properties within a well in a geological volume |
| US8146667B2 (en) * | 2010-07-19 | 2012-04-03 | Marc Moszkowski | Dual gradient pipeline evacuation method |
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-
2002
- 2002-11-06 US US10/289,505 patent/US6843331B2/en not_active Expired - Lifetime
-
2003
- 2003-11-03 DE DE60329214T patent/DE60329214D1/en not_active Expired - Fee Related
- 2003-11-03 AT AT03811248T patent/ATE442512T1/en not_active IP Right Cessation
- 2003-11-03 BR BR0315434-3A patent/BR0315434A/en not_active Application Discontinuation
- 2003-11-03 WO PCT/US2003/034993 patent/WO2004044366A2/en not_active Application Discontinuation
- 2003-11-03 AU AU2003301917A patent/AU2003301917A1/en not_active Abandoned
- 2003-11-03 DK DK03811248.8T patent/DK1558831T3/en active
- 2003-11-03 EP EP03811248A patent/EP1558831B1/en not_active Expired - Lifetime
- 2003-11-03 CA CA2505252A patent/CA2505252C/en not_active Expired - Fee Related
-
2005
- 2005-05-30 NO NO20052594A patent/NO330148B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7992654B2 (en) | 2001-02-15 | 2011-08-09 | Dual Gradient Systems, Llc | Dual gradient drilling method and apparatus with an adjustable centrifuge |
Also Published As
| Publication number | Publication date |
|---|---|
| NO330148B1 (en) | 2011-02-28 |
| EP1558831A4 (en) | 2006-03-22 |
| WO2004044366A2 (en) | 2004-05-27 |
| DK1558831T3 (en) | 2010-01-18 |
| AU2003301917A8 (en) | 2004-06-03 |
| EP1558831B1 (en) | 2009-09-09 |
| BR0315434A (en) | 2005-09-27 |
| US6843331B2 (en) | 2005-01-18 |
| US20030070840A1 (en) | 2003-04-17 |
| NO20052594L (en) | 2005-05-30 |
| EP1558831A2 (en) | 2005-08-03 |
| WO2004044366A3 (en) | 2004-08-05 |
| AU2003301917A1 (en) | 2004-06-03 |
| CA2505252C (en) | 2012-07-10 |
| DE60329214D1 (en) | 2009-10-22 |
| NO20052594D0 (en) | 2005-05-30 |
| ATE442512T1 (en) | 2009-09-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20181105 |